Method and means for the production of drawn metal rods



June 30, 1931.

J. T. -MOLTRUP I I METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS INVENTOR June 30, 1931. J. T. MOLTRUP METHOD AND MEANS FOR THEPRODUCTION OF DRAWN METAL RODS Filed April 6, 1928 17 Sheets-Sheet 2 NMkm. hum N INVENTOR June 30, 1931. J. T. MOLTRUF METHOD AND MEANS FOR THEPRODUCTION OF DRAWN METAL RODS Filed April 6, 1928 17 Sheets-Sheet 3INVENTOR NJ ms NNN NH 7 June 30, 1931. J. T. MOLTRUP METHOD AND mums FORTHE PRODUCTION OF DRAWN METAL 3on5 Filed April s. 1928 17 Sheets-Sheet 4mwN June 30, 1931. J. T. MOLTRUP v METHOD AND MEANS FOR THE PRODUCTIONOF DRAWN METAL RODS Filed April 6, 1928 17 Sheets-Sheet 5 q u Wm NWNINVENTOR June 30, 1931. J. T. MOLTRUP METHOD AND MEANS FOR THEPRODUCTION OF DRAWN METAL RODS Filed April 6, 1928 l7SheetsSheet 6 u 9rl Eu F q. v MN MN NWMMUW mm M m b. r Q F 91. Ll J. 1 r P N ""C 0 N lllrllllun Li li-r11 i G H. I wwwm mm M3 m? E 7 Av Q W w w a o Q ...o. 4%N g r A, mfiw @T h mv r m E E w i -M.-- R q s f 1115.265 ..o w um a Q F1 HUN-H a 7G \1 u I". a, @U .u. mm N J.. T. MOLTRUP June 30, 1931.

METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6.1928 17SheetsSheet 7 INVENTOR J a a Q ML I ism R June 30, 1931. J. T.MOLTRUP METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS FiledApril 6. 1928 17 Sheets-Sheet 8 NNN QM MHHW w )\rl$\ o mm 8 RN tfi QM. aH .H WW ww a @Q N o o o o o o o o m mm q O WK Q; bu m em 7 NR k b ll:11m! a 1 3 I a I R; Rm Wm mm. .H o 3 W \NN Q -W m w NW QM w. NM N A M nU NR NNN INVENTOR zi/ June 30, 1931. MQLTRUP 1,812,359

METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6,I928 17 Sheets-Sheet 9 INVENTOR June 30, 1931. J. T. MOLTRUP METHOD ANDMEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April e, 1928 17Sheets-Sheet 1o INVENT R j fizz-4% WWN June 30, 1931. J. T. MOLTRUPMETHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6,1928 17 Sheets-Sheet ll WNN 1m. L W

INVENTOR QNN DWN QNN June 30, 1931. J. MOLTRUP 1,812,359

METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6,1928 l7Sh9etS-Sheet l2 J 1 Q Q J43 141- f ("Tl Q 5 s53 gi l: s. j39- 155132 I 132 I M INVENTOR June'30, 1931. J. T.- MOLTRUP 1,812,359

METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6,1928 17 Sheets-Sheet l3 INVENTOR 17/5464 4? ,MAJA

June 30, 1931. J. T. MOLTRUP METHOD AND MEANS FOR THE PRODUCTION OFDRAWN METAL RODS Filed April 6. 1928 17 Sheets-Sheet l4 mNN R m 9% m mWNNI )NNN M NNN vmw m ANN QNN QNN .www 1 g .3 b EN QN PEN June 30, 1931.T, MOL RUP 1,812,359

METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6,1928 l'7'Sheets-Sheet 15 INVENTOR 1m; f u

June 30, 1931. J. T. MOLTRUP 1,812,359

METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Filed April 6,1928 17 Sheets-Sheet 16 v \lyENToz 5 45-4 ddwufi June 30, 1931. J. T.MOLTRUP METHOD AND MEANS FOR THE PRODUCTION OF DRAWN METAL RODS FiledApril 6, 1928 1'7 Sheets-Sheet l7 INVENTOR Patented June 30, 1 931UNITED STATES JAMES '1'. MOI-TRUE, OF BEAVER FALLS, PENNSYLVANIA METHODAND "MEANS FOR THE PRODUCTION OF DRAWN METAL RODS Application filedApril 6, 1928. Serial No. 267,875. 7

This invention relates tothe art of metal working and more particularlyto the art of producing cut to length drawn metal rods in a continuousmanner.

In carrying out my invention the rods are first drawn in long lengths,straightened and then cut to the desired length, in a continuous manner.

In the drawings I have shown one form of machine embodying my invention,which comprises a draw bench for drawing the rods, a receiving rack intowhich the drawn rods are deposited in successive order, transfermechanism for delivering the drawn rods to a straightening machine, areceiving rack for receiving the straightened rods, a cracker or shearsforcutting the drawn rods to length, transfer mechanism for deliveringthe straightened rods to theshears, a receiving rack for receiving thecut to length rods as they come from the shears and from which they aredelivered to trucks to be transferred to a ware-house or other suitablepoints.

Inthe drawings:

Fig. 1 is a diagram illustrating the general layout of the machine;

Fig. 1 diagrammatically illustrates the mechanism for closing the rodpushing mechanism, in front of the dies;

Fig. 2 is a plan view of the front end of the draw-bench portion of themachine;

Fig. 3'is a side elevation of the portion of the machine shown in Fig.2;

Fig. 4 is a plan view of the rear portion of the draw bench;

Fig. 5 is a side elevation of the portion of the machine shown in Fig.4;

Fig. 6 is a plan view of the straightener;

Fig. 7 is a side elevation of the straightener;

Fig. 8 is a plan view of the shears, together with a portion of the feedmechanism therefor and the receiving table for the cut rods;

Figf is a side elevation of the portions of the machine shown in Fig. 8;

Fig. 10 is a plan view of the front portion of the drawing mechanism ona larger scale;

Fig. 11 is an end view of the gripping jaws" 50 for pushing the rodsthrough the dies;

Fig. 12 is a sectional view on the line XIIXII of Fig. 4;

Fig. 13 is a sectional View on the line XIIL-XIII of Fig. 5;

Fig. 13 is a side elevation of the sliding support for thedrawing-gripper rack bar; 7

Fig. 14 is an end view of the guides for delivering rods to thestraightener;

Fig. 15 is a plan view of the straightener;

Fig. 16 is a side elevation of the straightener;

Fig. 17 is a detail sectional view on the line XVIIXVII of Fig. 16;

Fig. v18 is a similar view on the line XVIII-XVIII of Fig. 16;

Fi 19 is also a similar view on the line XI XIX of Fig. 15;

Fig. 20 is a detail side elevation partially in section of a universalbearing for one of the sets of rollers in the straightener;

Fig. 20 is a detail sectional view on the line XX"-XX of Fig. 21,looking in the direction of the arrows;

Fi 21 is a sectional view on the line X XXI of Fig. 20;

Fig. 21 is a diagrammatic top plan view indicating one angularrelationship of the straightening rollers;

Fig. 22 is a side elevation of a portion of the rack for receiving therods for the straightener and a portion of the mechanism for deliveringthe rods to the shears;

Fig. 23 is an end view of the mechanism shown in Fig. 22;

Fig. 24 is a detail sectional view on the line XVIIL-XVIII of Fig. 16looking in the opposite direction to that of Fig. 18, and on alargerscale;

Fig. 25 is a side elevation of the rod handlin mechanism beyond theshears;

Fig. 26 is an end view of the mechanism shown in Fig. 25;

Fig. 27 is a detail sectional view of a portion of the rod handlingmechanism shown in Figs. 25 and 26; and

Fig. 28 is a similar view of another ortion of rod handling mechanismshown in Figs. 25 and 26.

. The machine in general, as illustrated diagrammatically in Fig. 1,comprises a draw bench indicated by the reference letter having meansfor drawing the rods through a shaping die a; arack B forreceiving thebars as they are released from the drawing mech- 5 anism; feed mechanismCfor delivering the rods from the rack B to astraightener D in which therods are straightened. From the straightener the rods are delivered to aclapper box E above a second receiving rack F. Thestraightened rods aredropped from described the general outlay shown in Fig. 1,

but in Figs. 2, 4, 6 and 8 I have shown in plan a continuous apparatuswith two complete equipments for handling rods from the time they arefed to the dies to the time the 5 cut to length rods are positioned onthe racks J for delivery to the trucks for removal for shipping. Figs.3, 5, 7 and 9 also illustrate in side elevation a complete apparatusshown in plan in the above figures. I

The two draw benches, which extend from a short distance in back of arod supply table X in Figs. 2 and 3 to a point considerably beyond thestraighteners D in Figs. 6 and '7, are elevated to quite an extent abovethe shop floor a. They are supported on frame work 2, carrying aplatform 3, to which steps 4 lead from opposite sides and ends of theapparatus. The draw benches are also spaced apart a suflicient distanceto permit placing the straighteners D between the guides for the rackbars of the draw-benches.

These draw-benches, as well as the grippers for pushing the rods intothe dies and for pulling the rods through the dies, are similar to theapparatus shown in my former Patent,

551 gripper, see Fig. 10.

1,298,999, of April 1, 1919, and as the two draw-benches as well as theother parts of the apparatus on the two sides of the longitudinal centerthereof are duplicates, I will merely describe one set of mechanisms.

The die or dies a, through which the rods are first pushed and thendrawn, are mounted in a cross-head 5 forming part ofthe frame between arod pushing gripper; and a pulling The pushing gripper comprises a pairof jaws 6, having flanges 8 of generally cylindrical cross sectionmounted in similarly shaped guides in a cross-head 10, movable betweenguides 11on the frame of the ma chine, for a suflicient distance topushthe bar or bars through the dies far enough to permit them to be graspedby the jaws of the pulling gripper, as hereinafter described.

Racks 12 on the flanges 8 of the pushing grippers, are engaged bypinions 13 on shafts 14 rotated to close the jaws onto the bars or toopen them to release the bars after they have been pushed through thedies.

Connected to the upper end of each shaft 14 is a gear 15 which engages arack 16 connected to a cross-head 17 secured to a piston rod 18. Thisrod projects from a piston 19 within a cylinder 20, moved in bothdirections by fluid pressure from a suitable source controlled by avalve 21, see Figs. 10 and 1.

The valve 21 is located in a casing 22, and extending therefrom is anoperating handle 23, actuated by an operator whose station is locatedbetween the two draw-benches, to shift the valve to move the piston to.close the jaws 6. Connected to the cross-head 10 for movement therewithis an arm 24 arranged to engage an arm 25 connected to the stem of valve21, to shift the valve and consequently the pressure in cylinder 21 toopen jaws 6 when the rods have been pushed a predetermined distancethrough the dies.

As shown in Fig. 11, the jaws 6 are adapted to rock slightly about axeswhich are coincident with the centers of the flanges 8. By thisarrangement the jaws may uniformly engage two bars to push them throughdies of any desired construction, such as shown in my application SerialNo. 216,820, filed September -1, 1927, even though the bars are notexactly the same diameters, and apply substantially the same grippingpressure to both rods.

Fixedly mounted below the jaws 6 on the frame of the draw-bench, is acylinder 26,

.aving a piston therein having a piston rod which is in turn connectedto. cross-head 10. Fluid under pressure is continuously applied to oneend of the cylinder 26 tending to push cross-head 10 and jaws away fromthe die,

1n a manner similar to that shown in my Patent 1,298,999.

The cross-head 10 is moved forwardly to push the rods through the die bymeans of clutch links 27, which engage roller pins on the pullinggripper as disclosed in the above patent.

The clutch links 27 (Fig. 10) are pivoted attheir rear ends to thecross-head 10 at 28, While their forward ends are provided with hooks29, adapted to engage roller pins 30, on the draw head 31 when the drawhead is in its extreme return position. Stationary cams 32 engagerollers 33 on clutch links 27 to release the hooks 29 after the pushinggripper has pushed a rod through the die.

Pneumatic plungers 34 carrying rollers re Y sist outward movement of theclutch links 27 by fluid pressure Which is constantly admitteid tocylinders 34 from the pressure supp The pulling gripper jaws 35 arepivoted to each other by a pin 36, arranged to move in guide slots inthe upper and lower plates movement of draw head fee toggle levers arepivotally connected at scribed. The pushing the position of the draw'head 31. Toggle levers 37 are pivot'ally connected to each other at oneend by a pin 38, also adapted to move inslots in the draw head plates.The other ends of the 39 A to the rear ends of the jaw levers 35.

relatively light tension spring 40 is con- ,nectedto pins 36 and 38 tourge the pins towardeach other and open the jaws. A rack bar'41 isconnected to the head 31 for moving the pulling gripper toward and fromthe die. I v

The gripper jaw holding mechanism for holding the jaws 35 in rodreceiving position adjacent the die, during the initial outward 31,differs somewhat from that shown in my above mentioned patent, butfunctions in the same general manner. This holdingmechanism comprises alever 42, pivoted at43 to a bracket 44, connected to the die holdingcross-head 5. The outer end ,of lever 42 is providedvwith a cam surface45, an engaging hook 46, an adjustable stop screw 47, and a springpressed plunger 48.

1n the operation of the rod drawing mechanism, the drawing gripper iscontinuously reciprocated unless stopped by the operator. and isautomatically reversed at both ends of its stroke. by mechanismhereinafter degripper parts are in shown in Fig. 10, during the greaterpart. of the drawing movement of the drawing grippers as well as duringthe entire return m'ove-ment thereof.

The reversing mechanism is so set that a reversal of the drawinggrippers takes place just as the jaws are about to engage the crosshead5. During the return movement'of the .drawing grippers and just beforethe repin 36 rides i Versal takes place, a roller 49 on over cam face45, and moves lever 42 against the action of spring plunger 48. Just asroller 49 passes the high point of the cam and the hook .46 is movedinto engagement with the roller 49 by the plunger 48, the movement ofthe drawing gripper will be reversed.

During the return movement of .the drawing gripper, the operator w1llposition a rod in the mouth of the die after passing it between the jaws6 of the pushing grippers, and as soon as he has positioned the rod hewill actuate lever 23 of valve 21, to cause fluid to enter the cylinder20 at the proper end to close jaws 6 onto the positioned rod, so thatthe pushing grlpper is set to push the rod links are pushed throughgripper.

As the pulling gripper is returned, and just before the reversal takesplace, roller pins 30 will pass hooks 29 on links 27. The back againstthe plungers 34 by the rolier pins 30 which engage the inclined faces ofthehooks 29, and as soon as the rollers pass the ends ofthe hooks'thethe die on the return of the pulling plungers 34 will press the hooksinto engaging positions. of the parts are set for drawing a rod at thetime the reversal of movement of the pulling gripper takes place.

At the beginning of the drawing movement the jaws 35 of the drawinggripper will be held open by spring 40 and also held against movementwith the draw head 31 by the engagement-of hook 46 with roller 49, andthe positioned rod will be pushed through the die by jaws 6, through thelink connection between draw head 31 and pushing gripper. As the rollers33 engage cams 32 to release links 27, the end of the rod will have beenpushed between jaws 35 a sufficient distance to be gripped thereby. Justbefore the links 27 are released, arm 24 will engage valve lever 25 tothereby reverse the pressure in cylinder 20 and open jaws 6. As soon aslinks 27 are released the pushing gripper will be returned to theposition shown in Fig. 10.

During the initial drawing movement of head 31, the jaws 35 will be heldagainst movement therewith by the hook 46, and will be so held until theleft hand end of the slot in the plates of the draw head 31 engages pin38. When this occurs. the jaws 35 wilt have been closed onto the end ofthe rod to be drawn, as the jaws are held against movement with the drawhead 31 with sufficient resistance to insure closing of the jaws againstthe rod. After the jaws 35 have closed on the rod, further separation ofpins 36 and 38 is arrested, and roller 49 will then be drawn fromengagement with hook 46, and the rod will be drawn through the die bythe drawing gripper and will continue to be drawn under normalconditionsuntil the rod is drawn through the die. After the rear end the rod haspassed through the die, the pull on the jaws 35 will cease, and whenthis occurs, the spring 40 will open the jaws 35 and release the drawnrod which will drop into the receiving rack B (Fig. 13) below thedraw-bench.

The drawing gripper will be moved a short It will thus'be seen that alldistance beyond the point where the rear 2 end of the rod passed throughthe die, where its movement will be reversed automatically, andas themovement of the draw head is arrested and reversed, the momentum. andinertiaof the jaws 35 will cause the pin 38 to be moved to the right endof the slot in the plates of the draw head and thus jaws 35 will befully opened and in position for the next draw. However, if the jawshave not been fully opened and positioned as above described, they willbe so positioned when roller 49 engages cam surface 45 on lever 42,before the lever is moved against the action of plunger 48.

The draw head 31 is movably mounted on

